feat: WP-0002 T03 selection decision, wait on purchase

Recommend Scaleway Multi-AZ nl-ams. Inventory stays proposed with
description, decision, reef: refs, secret: handle, and consumers.
Human approval required before ordered.

schemas/resource-inventory.schema.json

@@ -12,6 +12,37 @@
     "financial_entity_id": {"type": ["string", "null"], "pattern": "^entity:[a-z0-9]+$"},
     "procuring_entity_id": {"type": ["string", "null"], "pattern": "^entity:[a-z0-9]+$"},
     "entity_gap": {"type": ["string", "null"]},
+    "description": {"type": "string", "minLength": 1},
+    "decision": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["status", "ref"],
+      "properties": {
+        "status": {"enum": ["recommended", "approved", "rejected"]},
+        "chosen": {"type": ["string", "null"]},
+        "rejected": {"type": "array", "items": {"type": "string"}},
+        "approved_by": {"type": ["string", "null"]},
+        "approved_on": {"type": ["string", "null"], "format": "date"},
+        "ref": {"type": "string", "minLength": 1}
+      }
+    },
+    "operational_refs": {
+      "type": "array",
+      "items": {"type": "string", "pattern": "^reef:"}
+    },
+    "credential_handles": {
+      "type": "array",
+      "items": {"type": "string", "pattern": "^secret:"}
+    },
+    "consumers": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["potential", "actual"],
+      "properties": {
+        "potential": {"type": "array", "items": {"type": "string"}},
+        "actual": {"type": "array", "items": {"type": "string"}}
+      }
+    },
     "resource_class": {"enum": ["compute_instance", "storage", "network", "kubernetes_capacity", "database", "managed_service", "self_managed_service", "shared_platform_service", "license"]},
     "status": {"enum": ["proposed", "ordered", "commissioning", "active", "suspended", "retiring", "retired", "rejected"]},
     "management_model": {"enum": ["provider_managed", "self_managed", "shared_capacity"]},